Fuel burner



May 29, 1928,

Ll c. R. STEWART FUEL BURNER Filed March 114, '1925 a sheets-sheet 1(Ya/ente Fussell ,Sie warf:

I N VEN TOR.

May 29, 19.281 1,671,494

c. R. STEWART FUEL BURNER Filed March 14, 1925 2 Sheets-Sheet 2 [Jarence Russell ,S'ewar lNvENToR BY l ATTORNEY Patented May 29, 1928.

UNITED STA .l l .l CLARENCE RUSSELL STEWART, OIEYMONTEREY PABX,CALIFORNIA, ASSIGNOR TO I PATEN.T"-.oi-Fic\i3;

4V:PEABODY ENGINEERING CORPORATION, OF NEW YORK, N. Y., A 'CORPORATIONOF NEW YORK.

FUEL BURNER.

Application led March 14, 1925. Serial No. 15,568.

This invention relates to a device for burning fuels in theform of'elastic fluids, mixtures of, fluids, or mixtures of fluids and solids inwhich the fluid or mixture to be burned is projected in the forni of ahollow divergent cone into a stream of air or oxygen with which it ismixed and carried into' a combustion space, and has for its object theproduction of a burner that will burn either or both'nonelastic fluid'fuel and fuels in the form of liquid including mixtures of ysolids andfluids, in. the same furnace, using the same furnace wall opening andcoinbustion air system, also providing a means of changing from onetothe other fuel with the least possible delay.

It will be noted that air vor other gases Imay be charged with largequantities of fineelastic fluid mixture is for combustion pur.-

poses similar to a gas and can be burned like. a gas in suitableapparatus'. My invention is therefore capable of burning liquid fuel'and any other combustible in an elastic fluid form.

A further object is the combination ofv liquid and gas burners soarranged astoprovide two divergent concentric cones of fuel when bothare in use, and to permit the withdrawal of either to inoperativeposition as desired.

The foregoing and other featuresof my invention will now be described inconnection with the accompanying drawing forming part of thisspecification, in which I have represented my fuel burner in -itspreerred form, after which I shall point out Amore particularly in theclaims those features which I believe to be new and of vmy owninvention.

Figure 1 is a longitudinal section of my burner supported in a frame ofan air reglister which may be mounted in a furnacel Wall. e

Figure 2 is a cross section along the lines- 2-2, Figure 1. i

Figures 3 and 4 are modified forms`of burners which I may employ.

In the carrying out of my invcntionI einploy an atomizer for liquids 1which may he of any typJeJ such-as the so-called mechanical atoinizerwith or without'an oilrrcturn line, or steam or air atomizer..Surrounding this atoinizer is a gas or fluid supply duct 2 of annular.section foi-'med by two concentric pipes- 2" and 2 closed lby asuitable wall at one end 2? and having an annular discharge p orifice 3at the other and an inlet 4. 1T he llugs Qd serve to' keep the two pipesconcenfric` inasmuch as they are not connected together in any way atthe discharge end. At

the same time the lugs 2d are small in area and do not seriouslyinterfere with the flowV fof the4 fluid. rl`he orifice 3 may be fixed asshown at`3 in Figure 3 or may have a variable* annular orifice as shownat 3 in Figure 4 so arranged that the orifice opening may be changedwhile the burner is in service. ClVith this latter arrangement a nearlyconstant fluid pressure and fluid exit velocity may be maintained at theburner tip throughout a wide range of volumelburned.

Surrounding this tubular gas supply pipe 2b, I provide a tubular sleeve5 which slides in the air register frame 6 and carries on its furnaceend a flame plate or diffuser 7. In-

lasmuch as any form of airregister or diffuser may be used they are notfurther described herein. v The oil burner or lat'omizer 1 slides insidet'lie tubular gas burner and may be -held in adjusted position thereinby any well known means as for example set screw 8. Likewise the tubularsleeve carrying the diffuser 7 is heldin normal position of operation bymeans 9 andthe whole burner within the air register may be held by theset screw 10.I y It will be readily understood that with thisarrangement either burner which is not in use can be drawn back so thatthe tip will be away 'from the heat. Also both' burners and flame plateare adjustable with ,reference to the-air register frame.

REV

Referring to Figure 3 lwhich is a simple y modification of my device,the pipe 30 is belled outon one end and threaded at the other. A cone 31supportedon rod 32 is ri 'dly held coaxial with pipe 30 by pins 33. heannular discharge orifice 3 as illustrated in Figure 1 may be varied byadjustf ing the cone piece 40 and securing it in adjusted position'by alock nut 41. If however it is advisable to provide a means-for adjustingthe annular dischar e'orice while- Figure 3 but act as a guiding meansin con-v tact with the inner wall of the pipe to keep the cone 4()coaxial with the throat piece 43.

I wish it distinctly lunderstood that my fuel burner described andillustrated is in the form in which I desire to construct it and thatchanges or variations may be made as may be convenient or desirableWithout departing from the salient features of my invention and Itherefore intend the following claims to cover such modifications asnaturally fall within the lines of invention.

I claim zl 1. A burnerconiprising a frame, a tubular sleeve slidable insaid frame and carrying at one end a flame plate, a tubular gas supplypipe slidable in said sleeve and having an annular discharge orifice,and an oil burner pipe slidable in said gas supply pipe and having itsdischarge orifice adjacent the annular discharge orifice when inoperative position.

2. A burner comprising a frame, a tubular sleeve slidable insaid frameand carrying at one end a flame plate, a tubular gas supply pipeslidable in said sleeve and having an annular discharge orifice, an oilburner pipe slidable in said gas supply pipe and having its dischargeorifice adjacent the annular discharge orifice when in operativeposition, and-means for holding the gas supply pipe in either operativeor inoperative position.

3. A burner comprising a frame, a tubular sleeve slidable in saidframeand carrying at one end va ila-me plate, a tubular gas supply pipeslidable in said sleeve and having vana'nnular discharge orifice, an,oiI burner pipe slidable in said gas supply pipe and having itsdischarge orifice adjacent the annular discharge orifice wheninoperative position, and' means for holding the oil burner pipe ineither operative or inoperative position.

4. A burner comprising a frame, a tubular sleeve slidable in said frameand carrying at one end a flame plate, a tubular gas supply pipeslidable in saidl sleeve 'and having an annular discharge orifice, anoil ``burner pipe slidable in said gas supply pipe and having itsdischarge orifice adjacent the annular discharge orifice when inoperative position and means for holding either or both of said pipes inoperative or inoperative position.

5. A'burner comprising a frame, a tulou-v lar sleeve slidable in saidframe and carrying at one end a. flame plate, a tubular gas supply pipeslidable in said sleeve and hav- Iing an annular discharge orifice, an'oil' burner pipe slidable in said gas supply pipe and having itsdischarge orifice adjacent the annular discharge orifice when'inoperative position, and means for holding Said flame plate in adjustedposition.

6. A burner unit comprising a plurality of i coaxial fuel supply pipes,a s eeve surrounding the outer end of-said pipes, all of saidl partsbeing mounted in asupport, means to unit as a whoIe or of the partsthereof independently of each other, and a diffuser or flame'platemounted on the forward end of' said sleeve.

7. A burner unit comprising aframe, .a sleeve adjustablysupportedtherein, a lurality of fuel supply pipes supported Within saidsleeve and coaxial therewith, a coni-V CLARENCE RUSSELL STEWART.

I effect the longitudinal adjustment of the`

